222 Captain Anderson on the peculiarity oj the tides 
consequently it must accumulate in Dungeness west bay, and 
rises proportionally from thence along the shore to the 
North Foreland for three hours and a quarter of the first 
of the regular flood tide, because the tide is rising generally 
every where ; and about this time the channel, becoming 
broader and deeper by the accumulation of the water and 
rising of the tide, is again sufficiently large to discharge 
the supply. The accumulated water being thus drawn off, 
as before mentioned, and with an accelerated current, to 
cover the flats and fill up the Medway, and the continental 
rivers, again begins to subside by the shore, at which precise 
period it is high water by the ground within the limits of 
accumulation, both on the English and French coasts ; but 
without these limits it is only half tide of flood ; and therefore 
the true or regular flood tide must run three hours and a 
quarter longer to the eastward, during which time the water 
falls by the shore, within the limits of accumulation, until 
it finds its level every where ; and so rises and falls in per- 
petual rotation. 
The tide, within the limits where the water accumulates, is 
found to rise from 28 feet to 30 feet perpendicularly, which is 
from 7 to 8 feet higher than it generally rises in the Channel. 
The following seem to be causes of this extraordinary rise. 
At half tide by the shore, within these limits, the water has 
found its level every where, and half the rise of the tide 
here, at high water (viz. 14 or 15 feet), being drained off to 
make high water without the North Foreland, and produce 
the level, is now contained in a space twice the breadth it for- 
merly occupied ; of course it follows, the same quantity of 
water will only be half the depth (or from 7 to 8 feet) that 
